CA2168532A1 - Adaptively Controlled Filter - Google Patents

Adaptively Controlled Filter

Info

Publication number
CA2168532A1
CA2168532A1 CA2168532A CA2168532A CA2168532A1 CA 2168532 A1 CA2168532 A1 CA 2168532A1 CA 2168532 A CA2168532 A CA 2168532A CA 2168532 A CA2168532 A CA 2168532A CA 2168532 A1 CA2168532 A1 CA 2168532A1
Authority
CA
Canada
Prior art keywords
calculated
output
threshold value
signal series
series
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2168532A
Other languages
French (fr)
Other versions
CA2168532C (en
Inventor
Shin'ichi Koike
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Publication of CA2168532A1 publication Critical patent/CA2168532A1/en
Application granted granted Critical
Publication of CA2168532C publication Critical patent/CA2168532C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H21/00—Adaptive networks
    • H03H21/0012—Digital adaptive filters

Landscapes

  • Filters That Use Time-Delay Elements (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)

Abstract

An rms value of a sum signal series x = en + vn calculated by adding a noise series to an error signal series of a known signal series and an unknown signal series, is calculated by an rms calculator. By means of an amplitude controller, x is output as is when ¦x¦ is smaller than a threshold value A proportional to the rms value.
When ¦x¦ is greater than the threshold value A, a product signal calculated by multiplying the polarity of x with the threshold value is output. Utilizing the output of the amplitude controller, respective tap weights of filter is corrected to generate be tap weights Ck(n). By this, switching control between a probability gradient LMS
algorithm ( LA ) and a probability gradient sign algorithm ( SA ) can be performed smoothly. Thus, an adaptively controlled filter having an advantage of small residual error and fast convergence of LA and an advantage of satisfactory strength against disturbance, such as burst noise or so forth of SA, can be obtained.
CA002168532A 1995-02-01 1996-01-31 Adaptively controlled filter Expired - Fee Related CA2168532C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP014842/95 1995-02-01
JP7014842A JP2885269B2 (en) 1995-02-01 1995-02-01 Adaptive control filter

Publications (2)

Publication Number Publication Date
CA2168532A1 true CA2168532A1 (en) 1996-08-02
CA2168532C CA2168532C (en) 1999-10-12

Family

ID=11872300

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002168532A Expired - Fee Related CA2168532C (en) 1995-02-01 1996-01-31 Adaptively controlled filter

Country Status (6)

Country Link
US (1) US5784304A (en)
EP (1) EP0725480B1 (en)
JP (1) JP2885269B2 (en)
AU (1) AU691709B2 (en)
CA (1) CA2168532C (en)
DE (1) DE69617065T2 (en)

Families Citing this family (34)

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US7190720B2 (en) * 2001-07-03 2007-03-13 Zenith Electronics Corporation Tap weight initializer for an adaptive equalizer
US6223194B1 (en) 1997-06-11 2001-04-24 Nec Corporation Adaptive filter, step size control method thereof, and record medium therefor
JP3216704B2 (en) 1997-08-01 2001-10-09 日本電気株式会社 Adaptive array device
JP3296330B2 (en) 1999-05-20 2002-06-24 日本電気株式会社 Adaptive filter, control method of adaptive filter, and storage medium storing program
GB2357938A (en) 1999-12-24 2001-07-04 Nokia Networks Oy Selecting one of a plurality of equalisation algorithms
US6665695B1 (en) * 2000-01-14 2003-12-16 Texas Instruments Incorporated Delayed adaptive least-mean-square digital filter
US6501329B1 (en) * 2000-11-16 2002-12-31 Linear Technology Corporation Adaptive filtering for improved RMS-to-DC signal conversion
AU2003213180A1 (en) * 2002-02-20 2003-09-09 Qualcomm Incorporated Adaptive filtering with dc bias compensation
KR20040092763A (en) * 2003-04-29 2004-11-04 삼성전자주식회사 Method for detecting binary data and apparatus thereof
US7136536B2 (en) * 2004-12-22 2006-11-14 Telefonaktiebolaget L M Ericsson (Publ) Adaptive filter
JP5430990B2 (en) * 2009-03-25 2014-03-05 株式会社東芝 Signal processing method, apparatus and program
JP6221623B2 (en) * 2013-10-23 2017-11-01 日本電気株式会社 Information processing apparatus, information processing method, and program
US9689967B1 (en) 2016-04-07 2017-06-27 Uhnder, Inc. Adaptive transmission and interference cancellation for MIMO radar
US10261179B2 (en) 2016-04-07 2019-04-16 Uhnder, Inc. Software defined automotive radar
US9846228B2 (en) 2016-04-07 2017-12-19 Uhnder, Inc. Software defined automotive radar systems
US9599702B1 (en) 2016-04-25 2017-03-21 Uhnder, Inc. On-demand multi-scan micro doppler for vehicle
US9791564B1 (en) 2016-04-25 2017-10-17 Uhnder, Inc. Adaptive filtering for FMCW interference mitigation in PMCW radar systems
US10573959B2 (en) 2016-04-25 2020-02-25 Uhnder, Inc. Vehicle radar system using shaped antenna patterns
US9791551B1 (en) 2016-04-25 2017-10-17 Uhnder, Inc. Vehicular radar system with self-interference cancellation
EP3449275A4 (en) 2016-04-25 2020-01-01 Uhnder, Inc. Pmcw pmcw interference mitigation
WO2017187331A1 (en) 2016-04-25 2017-11-02 Uhnder, Inc. Vehicle radar system with a shared radar and communication system
US9945935B2 (en) 2016-04-25 2018-04-17 Uhnder, Inc. Digital frequency modulated continuous wave radar using handcrafted constant envelope modulation
WO2017187299A2 (en) 2016-04-25 2017-11-02 Uhnder, Inc. Successive signal interference mitigation
US9753121B1 (en) 2016-06-20 2017-09-05 Uhnder, Inc. Power control for improved near-far performance of radar systems
WO2018051288A1 (en) 2016-09-16 2018-03-22 Uhnder, Inc. Virtual radar configuration for 2d array
US10908272B2 (en) 2017-02-10 2021-02-02 Uhnder, Inc. Reduced complexity FFT-based correlation for automotive radar
US9971020B1 (en) 2017-02-10 2018-05-15 Uhnder, Inc. Radar data buffering
US11454697B2 (en) 2017-02-10 2022-09-27 Uhnder, Inc. Increasing performance of a receive pipeline of a radar with memory optimization
US11105890B2 (en) 2017-12-14 2021-08-31 Uhnder, Inc. Frequency modulated signal cancellation in variable power mode for radar applications
DE102018203137A1 (en) * 2018-03-02 2019-09-05 Robert Bosch Gmbh Method, device and computer program for operating an at least partially autonomous vehicle
US11474225B2 (en) 2018-11-09 2022-10-18 Uhnder, Inc. Pulse digital mimo radar system
US11681017B2 (en) 2019-03-12 2023-06-20 Uhnder, Inc. Method and apparatus for mitigation of low frequency noise in radar systems
KR20210072998A (en) * 2019-12-10 2021-06-18 삼성전자주식회사 Apparatus and method for estimating bio-information
WO2021144710A2 (en) 2020-01-13 2021-07-22 Uhnder, Inc. Method and system for multi-chip operation of radar systems

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE68920362D1 (en) * 1988-06-09 1995-02-16 Nat Semiconductor Corp Hybrid stochastic gradient algorithm for the convergence of adaptive filters.
JPH04252609A (en) * 1991-01-29 1992-09-08 Canon Inc Automatic equalizer
JPH0514131A (en) * 1991-07-02 1993-01-22 Hitachi Ltd Automatic equalizer
DE69230969D1 (en) * 1992-07-10 2000-05-31 Ibm Method and device for adaptive equalization

Also Published As

Publication number Publication date
DE69617065D1 (en) 2002-01-03
AU4227196A (en) 1996-08-08
EP0725480A1 (en) 1996-08-07
CA2168532C (en) 1999-10-12
US5784304A (en) 1998-07-21
DE69617065T2 (en) 2002-04-11
EP0725480B1 (en) 2001-11-21
AU691709B2 (en) 1998-05-21
JPH08213880A (en) 1996-08-20
JP2885269B2 (en) 1999-04-19

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